"Say Yes to the Dress" fans can't get enough of Randy Fenoli. And it's no wonder why -- Kleinfeld Bridal's fashion director always finds the right dress for a bride, even if it's the last style she would've picked herself. What does Randy know that brides don't?

Decades of working in the fashion industry have taught Randy all about fit. The ideal fit is achieved through alterations. "[The] alterations, "Randy says, "[are] one of the most important factors in purchasing a wedding dress." After all, a wedding gown is "the most photographed dress [of a girl's] entire life," so it must lay perfectly against her every curve.

As Randy explains, every wedding dress has its own distinct shape, and every woman's body does, too. The purpose of alterations is to make the gown fit the bride's unique figure. When alterations are done well, the gown will move with the bride's body.

And if alterations aren't done well (or done at all)? Imagine pulling on your strapless dress all night. Tripping on your hem as you walk down the aisle. Struggling to dance, eat or breathe because your bodice is too tight.

These worst-case scenarios can be prevented! Here's what you need to know so you're prepared for the alterations process.

Brides who want to slim down and tone up before their wedding day need effective exercises designed to target specific areas. We've got 10 of the best moves for shoulders, waists and a killer bottom half.